An ATV gearbox conversion part designed to broaden gearing choices and improve drivetrain smoothness. Riders who upgrade small ATVs gain more control and lighter handling with fewer compromises. Will the combination of multiple gear options and a lightweight build suit your machine and riding style? SxRakiO ATV Engine Gearbox
⚡ At a Glance
- • Gear Ratios: 11T, 14T, 17T and 20T options matched to T8F chain with an available 5:1 ratio
- • Best for: Owners upgrading 40-5 or 40-6 ATVs and minibike enthusiasts using 43–49cc engines
- • Not ideal for: Machines with engine sizes above 49cc or full-size ATV transmissions
Multiple selectable gears and T8F chain compatibility allow tailoring of final drive. Processed gear set and structural optimisation aim for smoother running while keeping weight to 0.96kg.
Easier torque control - thanks to multiple gear ratio options
Four gear sizes (11, 14, 17 and 20T) pair with a T8F chain and can be used with a 5:1 gearing setup to alter final drive. Selection of different sprockets changes mechanical advantage without modifying the engine.
Choose lower ratios for stronger hill-climbing torque or higher ratios for improved top speed, letting owners adapt gearing to terrain or load.
Lighter handling - thanks to 0.96kg lightweight construction
Overall assembly weight is specified at 0.96kg, which reduces added mass to the drivetrain and rotating components. Lower weight decreases the impact on suspension and rotational inertia.
Reduced weight helps with quicker acceleration response and easier manoeuvring on tight trails, beneficial for recreational riders and hobbyists.
Smoother power transfer - with processed gear set and structural optimisation
Gears undergo processing intended to improve mesh and reduce irregularities in engagement, while structural optimisation refines alignment and load paths. The net result is smoother gear operation.
Smoother engagement cuts harshness during acceleration and should prolong component life through more even wear during typical off-road use.
✨ The 4 Key Reasons for SxRakiO ATV Engine Gearbox
- T8F chain compatibility - Secure chain fit reduces slippage on steep climbs
- Optimised gear machining - Lower vibration for quieter, longer-lasting operation during heavy use
- 0.96kg lightweight build - Reduces rotational load for snappier acceleration response on loose surfaces
- Direct fit for 40-5/40-6 engines - Fast installation with minimal modification for most hobby riders
📋 Technical Details at a Glance
- Category: ATV gearbox
- Compatibility: Suited for 40-5 and 40-6 ATV engine models
- Suitable engines: Compatible with 43cc to 49cc two-stroke and four-stroke clutch engines
- Gear specifications: 11T, 14T, 17T, 20T options
- Chain type: Matched with T8F chain
❓ Frequently Asked Questions
Q: Is this gearbox compatible with my 49cc clutch engine?
A: Yes, compatibility is stated for 43–49cc two-stroke and four-stroke clutch engines, so 49cc clutch engines are within the supported range.
Q: Are different sprocket sizes included or supported?
A: Multiple sprocket sizes are available, specifically 11T, 14T, 17T and 20T, and these are matched to a T8F chain with a 5:1 gearing option.
Q: Will installation require heavy modification to a 40-6 ATV?
A: Fitment is described as suitable for 40-5 and 40-6 ATV engine models and is noted as easy to install, indicating minimal modification for compatible mounts.
🏆 Our Verdict
Suitable for hobby riders and minibike owners who want to tune gearing on 43–49cc machines, especially those upgrading 40-5 or 40-6 setups. The key selling point is the combination of multiple sprocket options, T8F chain compatibility and a processed, optimised gear set in a lightweight package. While cost depends on the retailer, durable gearing and broad compatibility make it a practical long-term upgrade for frequent off-road use.
